Open AccessSub-100nm resolution PSIM by utilizing modified optical vortices with fractional topological charges for precise phase shifting
Author(s) -
Shibiao Wei,
Ting Lei,
Luping Du,
Chonglei Zhang,
Houkai Chen,
Yong Yang,
Shu Zhu,
Xiaocong Yuan
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.030143
Subject(s) - optics , interference (communication) , phase (matter) , plasmon , optical vortex , physics , vortex , aperture (computer memory) , amplitude , optical tweezers , topology (electrical circuits) , computer science , telecommunications , channel (broadcasting) , beam (structure) , mathematics , quantum mechanics , combinatorics , acoustics , thermodynamics
We demonstrate an all-optical plasmonic structured illumination microscopy (PSIM) technique. A set of plasmonic standing-wave patterns is excited by amplitude-modified optical vortices (OVs), which have fractional topological charges for precise phase shift of {-2π/3, 0, 2π/3}. A specially designed optical aperture is introduced to modify the OVs in order to improve the uniformity of interference patterns. The imaging results of fluorescent beads reveal a sub-100nm resolving capability in aqueous environment. This PSIM technique as a structure-free, wide-field and super-resolved imaging technique is of great potential for low-cost biological dynamic imaging applications.